SY/T 6492-2000 Technical Specification for Calibration Devices of Sonic Logging InstrumentsSY/T6492-2000 Standard download decompression password: www.bzxz.net

1CS 73.020
Record number: 8167—2001
Petroleum and natural gas industry standard of the People's Republic of ChinaSY/T 6492—200
Technical specification for acoustic logging calibration device2000-12-12 Issued
State Administration of Petroleum and Chemical Industry
2001-06-01 Implementation
SY/T6492—2000
Cited standards
3 Technical requirements for acoustic logging calibration device 4 Requirements for setting value and calibration operation of acoustic logging calibration device
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SY/T 6492—2000
According to the use of acoustic logging equipment and the metrological technology level that can be achieved in the past, a comparable, scientific and accurate acoustic logging calibration device should be established in the oil well logging industry, and the technical performance and calibration working standards of the device should be determined.
This standard is proposed by China National Petroleum Corporation. The Petroleum Logging Professional Standard Promotion Committee of this standard belongs to: The drafting unit of this standard: Daqing Petroleum Administration Bureau Logging Company. The main drafters of this standard are Li Yance, Chen Gang, Wang Xudong, and Sun Wenjun
Technical Specification for Acoustic Logging Calibration Device of Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 6492—2000
This standard specifies the technical requirements and set values ​​of the acoustic logging calibration device of the petroleum logging industry. Calibration method, this standard applies to the construction, set value and calibration of the acoustic logging calibration device. 2 Reference standards
The following standards contain provisions that constitute the provisions of this standard without being cited in this standard. At the time of this standard edition, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards: SY/T5132-1997 Measurement and original data quality recording requirements 3 Technical requirements for the calibration device of the sonic velocity logging instrument 3.1 The composition of the sonic velocity logging and calibration device
3.1.1 The sonic velocity logging calibration device is made of materials with stable acoustic properties: a) Generally, it is made of steel (casing), and can also be made of aluminum alloy materials: b) It is equipped with a 2~3MPa pressure-adding device; e) The material used for the sonic velocity logging calibration device should meet the technical specifications of steel casing and aluminum alloy pipe. 3.1.2 Technical requirements for sonic logging and calibration devices:) Acoustic time difference value:
1) Steel (casing): 187us/m;
2) Lead (alloy): 182187g/mls
h) Dimension requirements for the calibration device:
1) Length: 6000mm±8mm
2) Inner diameter: 200mm±2mm;
3) Wall thickness not less than 10mm
3.2 Environmental requirements for sonic logging and calibration devices 3.2.1 Sonic logging calibration devices are generally built indoors and installed below the ground. 3.2.2 The ambient operating temperature of the instrument calibration is 5-40℃. 3.2.3 When calibrating the instrument, the calibration device of the velocity logging instrument should be filled with clean water. 3.3 Auxiliary equipment for the calibration of velocity logging instruments
a) Hoisting:
b) Surface system of velocity logging.
3.+ Calibration requirements
3.4.1 The acoustic wave time difference error of the calibration device is ±1μs/m-3.4.2 The calibration device is suitable for compensating the calibration of various types of velocity logging instruments such as south wave, long source distance acoustic wave, high resolution acoustic wave, array acoustic wave, etc.:
Approved by the State Administration of Petroleum and Chemical Industry on December 12, 2000 and implemented on June 1, 2001
SY/T 6492--2000
3.4.3 Before calibration, the instrument sound system should be checked to ensure that the eccentricity angle between it and the instrument axis is not greater than 0.5°3.4.4 The calibration error of the instrument in the calibration device should meet the relevant requirements of SY/5132. 3.5 Calibration steps
3.5.1 Place the sound velocity meter in the calibration device and pressurize it to 2~3MPa. 3.5.3 The acoustic time difference value of the instrument scale is the calibration value of the corresponding acoustic logging calibration device, and the calibration error should comply with the specification of 3.4.4. 4. Determination and verification of the calibration device of the acoustic logging instrument 4.1 The acoustic time difference of the acoustic logging calibration device is measured by the acoustic logging calibration device in a tubular medium with a limited thickness. Since the thickness of the steel casing or aluminum alloy pipe is limited, the sound velocity of the medium to be measured is the plate wave (or Lamb wave) with a speed of 1. , the actual longitudinal wave sound velocity of casing or lead alloy pipe is p4.2 The constant value of the longitudinal wave velocity of steel casing and lead alloy pipe: The constant value of the longitudinal wave velocity (△t=1/) of the material used in the calibration device is given by the acoustic detection laboratory of the narrow logging key experiment:
The laboratory test data of the longitudinal wave velocity of steel casing is 5740~5860m/s (4t=170-~174ms/m); the laboratory test data of the longitudinal wave velocity of aluminum alloy pipe is 6340m/(△t, =158us/m). Note: Data given in Handbook of Acoustics (edited by Ma Daxian et al., Science Press, (1983)): 5750 m/s for steel, 6320 m/s for aluminum alloy, 4.3 Sound velocity measuring and calibrating device for determining the acoustic time difference: 4.3.1 Formulas required for determining the value:
1) Plate wave velocity and longitudinal wave velocity are calculated as shown in formula (1) and formula (2): Vp()
Up=NV(1-a)(1-2a)Www.bzxZ.net
Where: 2——
Plate wave propagation velocity, m/s;
T/p--Longitudinal wave propagation velocity, n/s;
E—Young's modulus, N/m2
Lubricity-looseness ratio, 1 for murine class;
Density, kg/m
2) The ratio of plate wave velocity to weaving wave velocity is shown in formula (3): 1 1 - 2a
4.3.2 For steel sleeve arm, the treatment ratio g = 0.257 ~ 0.27, the tree response /vp = 0.929 -- 0.936, △t: /t = 1.068 -21.076: Steel pipe material data and laboratory test data, the acoustic inversion measurement and calibration device wave time difference value 3p = 5750m/sAtp = 174μs/m, 4tj. = [74 × 1.076 = 187(us/m) :4.3.3 For the pin alloy tube, Poisson's ratio π=0.33, corresponding to /0.870, 2/:=1.149: From the pin alloy tube material data and laboratory test data, Vp=6320m/s.Atp=158us/m, the clamp alloy tube sound velocity measurement and calibration device sound wave time difference value At:=158×1.149=182(g18/m)4.+WP (longitudinal wave velocity) experimental space determination: 4.4.1 Sample the materials used to build the calibration device and make a rectangular module with a volume of not less than 10mm×10mm×40mm, with a quantity of not less than
4.4.2 Send the module as a sample to the key laboratory for measurement. The average error of measuring the sound wave time difference should be less than 1us/m. 4.4.3 The acoustic time difference value of the calibration device (the acoustic time difference value of the tube wave) is confirmed by the laboratory test data through the calculation process in 4.3. 2
SY/T 6492--2000
4.4.4 The samples used for setting the values ​​after verification shall be stored under the same environmental conditions as the calibration device. 4.4.5 Every 5 years or when the instrument calibration is abnormal, the stored samples shall be sent for inspection. 5 Requirements for calibration operation
5.1 The instrument shall be cleaned before calibration
2 A centralizer shall be added when calibrating the instrument.
After the calibration of the instrument is completed, the water in the calibration device shall be kept clean. 5.3
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